*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970159380163
197003190022
1971304007
1972101002
19730280010
19740470011
1975005005
1976013004
1977207009
197813120016
197902190021
19801590015
1981313007
1982112004
19830280010
1984023005
198527100120
198657180131
1987111150128
1988612160236
19892213521189
199036448900169
1991245213600212
19921195812800305
19938412821600428
19945512214300320
19954813819400380
19965413619701388
1997309813801267
199856619300210
199910477400131
200014217700112
200116308703136
2002827630199
20032278901119
200425186500108
200526229100139
2006598800102
20071129200105
200822611400142
200911815900178
2010102514000175
201148360048
201216240031
201346240034
20145054900104
2015523280056
20161418370069
2017912520073
2018310370050
20191112460069
202059390053
2021159470071
202249410054
2023125008
20240650011
Total885126932021145371